Oil-burning heater.



M. E. HURLEY.

OIL BURNING HEATER.

APPLICATION FILED JAN. 12. I916.

Patented Oct. 3, 1916.

M. E- HuRLEY MILO E. HURLEY, OE'IVIISSOUBI VALLEY, IOWA.

OIL-BURNING HEATER.

Specification of Letters Patent.

Patentedflct. s, 1916.

Application filed January 12, 1916. Serial No. 71,733.

To all whom it may concern:

Be it known that I, MILO E. HURLEY, a citizen of the' United States,residing at Missouri Valley, in the county of'I-Iarrison and State ofIowa, have invented certain new and useful Improvements in Oil-BurningHeaters, of which the following is a specification, reference being hadto the accompanying drawings.

My invention relates to stoves and heaters of like character, andparticularly to stoves or heaters designed to burn oil wherein the oilis vaporized or gasified before it is burned.

The general object of my invention is to improve upon heaters of thischaracter by so constructing the burner and its allied parts that thevaporized oil is thoroughly mixed with air as it is burned and that theflames issuing from the burner are forced by the draft of the stovedownward and into the fire pot and that thus no heat is lost.

A further object is to improve upon the specific construction of theburner, provide for a ready vaporization ofthe oil prior-to itsbeingignited, and to provide further that the flames issuing from theburner shall be directed downward upon the burner so as to constantlyvaporize the oil or other fuel which rises into the burner.

Still another object is to so construct the heater that it. may bereadily cleaned and readily and cheaply manufactured.

My invention is illustrated in the accompanying drawings, wherein:

Figure l is a front elevation of a heater constructed in accordance withmy invention; Fig. 2 is top'plan view; Fig. 3 is a vertical section. 3

Referring to these figures 1O designates an outer casing of sheet ironor other suitable material and inclosing an inner casing 11 forming achamber 12 within which is located a fire pot 13 of refractory material.The inner casing 12 may be supported within the outer casing in anysuitable manner and the fire pot may also be supported within the innercasing inany suitable manner. Preferab'ly the fire pot is detachable.The top 14 of the outer casing is formed with a central opening 15wherein is located a downwardly extending draft pipe 16 which at itsupper end is flanged so as to seat upon the margin of the opening 15.This draft pipe 16 extends downward below the upper end of the fire pot13. The top 1& is also provided with a plurality of cleaning openings 17each of which is closed by a lid 18 having a handle 19, these cleaningopenings extending transversely of the top as illustrated in Fig. 2. Thedraft pipe 16 may also be provided with a cover 20 as indicated in Fig.2 whereby it may be closed when the stove is not in use. Exteriorly ofthe inner casingll and at the rear of the stove there is a rearwardlyinclined passageway 21 having a fiue opening 22 from which a flue mayextend for the discharge of combustion products.

Disposed within the fire pot 13 and resting upon its bottom is a fuelvaporizing member 23 which consists of'a preferably solid casting havinga central bore 24 and a circular chamber 25 at its upper end and intowhich the bore opens. The top wall 26 of this chamber is formed with acentral opening screw threaded for engagement with a burner pipe 27whose upper end is closed by a cap 28 having'perforations 29, theseperforations being directedradially to the axis of the cap. The lowerend of the bore 24: is screw threaded forengagement with the upper endof a feed pipe 30 which extends out through the casing 11 and the casing10 and to a source of supply. This source of supply or tank shouldbelocated at a higher level than the cap 28 so that fuel will be forcedthrough the pipe by gravity and up through the member 23, pipe 27, andout of the perforations 29. The lower portion of the member 23 is formedwith an annular cup 31. having outwardly flaring sides, which cup isdesigned to be filled with asbestos 32.

The lower end of the chamber defined by the outer casing 10 is formedwith a sliding pan 33 which may be drawn out through an opening formedin the casing wall as shown clearly in Figs. 1 and 3. The object of thispan is to catch all dirt that drops to the bottom of the outer casingand to permit the removal of the dirt and soot so collected. The objectof the openings 17 is also for the purpose of cleaning out the interiorof the casing 10, while the fire pot maybe cleaned by removing the draftpipe 16. If the burner, cap or pipe should need cleansing they can beeasily removed through the opening 15 and then replaced. The asbestos 32may be also removed and replaced through this opening.

Attention is particularly called to the fact that the draft pipe 16extends'down below the upper end of the fire pot 13 and that the burnerpipe 27 extends upward above the lower end of the draft pipe and thatthe cap 28 is located above this lower end. The pipe 16 admits air tothe burner and is in deed the only source of air. When the vaporizedfuel is burning at the perforations 29 the vaporized fuel will be mixedwith air at this point and the downwardly moving column of air in thepipe 16 will cause the flames of the burner to be forced downward aroundthe pipe 27 and around the wall of the chamber 25. Furthermore, theseflames will be forced downward against the walls of the fire pot 13 andupward through the open end of the fire pot. Inasmuch as the flames areforced downwardaround the burner 27 and the burner chamber 25 the liquidfuel which passes into the chamber 25 is continually vaporized andplaced in condition for proper combustion at the perforations 29. 'Atthe same time the draft does not allow any fumes or combustion productsfrom the burning oil to pass into the room but these'are carried outthrough the flue opening'22. Initially the oil or other fuel isvaporized by turning on the fuel and allowing it to issue unlighted fromthe perforations 29. This fuel will. drip downward along the pipe 27 andthe top of the chamber 25 and into the cup 31 where it will saturate theasbestos. When the asbestos has become thoroughly saturated it may beignited by applying a match thereto through an opening indicated in Fig.1 and desig nated 34, this opening being formed in the wall of the firepot and haying a surrounding wall extending to the side wall of thestove. This opening is normally closed by any suitable ClOOI' OI otherolosure- It will be seen that the gas or vaporizedfuel passing outthrough the perforations 29 mixes with the air before the gas enters thefire pot. The heater is made of cast iron and sheet metal. and is sodesigned as to get thoroughly good radiation and good service bysecuring as far as possible all of the heat from the fuel. The heat hasto pass from the fire pot toward the top of the heater and then down thefront part of the heater, the casing 11 extending transversely entirelyacross the heater, and then beneath the casing 11 and up to the backpart of the heater and out through the escape flue. The oil used forthis heater may be kerosene oil or distillate oil but the latter givesthe better results.

It is to be noted that the inner casing 11 extends entirely across theouter casing 10 as shown clearly inFig. 1 but that the front and rearwalls of the casing 11 are spaced from the front and rear walls of thecasing 10 and that the rear wall ofthe casing 11 extends upward as at llinto contact with the top wall of the casing 10. By reason of thisconstruction the heated air, combustion products, etc, are forced upwardtoward the upper portion of the fire pot and then downward around thecasing 11 and into relatively close contact with the front, rear andbottom walls of the heater and then upward and out of the flue so thatthe heat cannot pass directly to the flue but must travel a relativelycircuitous course.

Having described my invention, what I. claim is: V I

1. In an oil burning heater of the character described, an outer casing,a fire pot therein, a draft pipe extending downward through the outercasing and into the fire pot, a member carried at the lower portion ofthe fire pot and formed to provide a vaporizing chamber, said memberbeing connected to a source'of supply, and a pipe leading fromthevaporizing chamber and extending upward into the lower end of the draftpipe and formed with a burner, the lower end of the draft pipe beingspaced from the upper end of the vaporizing chamber and having adiameter approximately the same as the vaporizing chamber.

2. In an oil burning heater of the character described, an outer casing,a fire pot therein, a draft pipe extending downward from. the top of theouter casing and into the fire pot, a member carried at the lowerportion of the fire pot and formed to provide a vaporizing chamber, saidmember'being connected to a source of supply, and a pipe leading fromthe chamber extending upward into the lower end of the draft pipe andformed with a burner.

3. In an oil burning heater of the character described, an outer casing,a fire pot mounted within said casing, a draft pipe extending downwardfrom the casing open at both ends and having its lower end disposedbelow the top of the fire pot, a member disposed at the lower end of thefire pot and including a vaporizing chamber, said chamber beingconnected to a source of supply, a relatively small fuel pipe risingfrom said chamber and extending into the lower end of the draft pipe,and a detachable cap mounted upon the upper end of said fuel pipe abovethe lower end of the draft pipe, the cap having radially disposedperforations.

MILO E. HURLEY.

Witnesses:

T. L. FINLEY, T. Foss.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

